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<p class="MsoNormal"><span lang="EN-US">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’ve encountered an issue when testing our gst-rtsp-server based implementation with one VMS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We have an audio/video pipeline in gst-rtsp-server, and the GstRTSPMediaFactory is configured to be shared.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This is working fine with majority of clients which receive both audio and video streams when doing RTSP requests.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">However, one VMS client is doing separate RTSP sessions for getting audio and video streams using the same URL.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So instead of doing this:<o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo3"><span lang="EN-US">DESCRIBE /media<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo3"><span lang="EN-US">SETUP /media/stream=0<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo3"><span lang="EN-US">SETUP /media/stream=1<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo3"><span lang="EN-US">PLAY /media<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US">It does this:<o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo4"><span lang="EN-US">First session DESCRIBE /media<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo4"><span lang="EN-US">First session SETUP /media/stream=0<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo4"><span lang="EN-US">First session PLAY /media<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo4"><span lang="EN-US">Second session DESCRIBE /media<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo4"><span lang="EN-US">Second session SETUP /media/stream=1<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo4"><span lang="EN-US">Second session PLAY /media<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US">And the end results is that it will only receive audio or video (based on which SETUP request comes first).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If we set the GstRTSPMediaFactory shared property to false, then the problematic VMS receives both audio and video.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Also, if GstRTSPMediaFactory shared property is true and we start the audio and video stream using some other client which behaves ok, as long as those streams are left open the problematic VMS will manage to establish
both audio and video streams.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From my perspective this looks like some kind of problem with shared media.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My question is, is there some additional handling we need to do in case when we use shared media and we want to support the use case where RTSP clients can request only video or only audio stream with it?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Or can this be considered a bug?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards,</span><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:gray"><br>
<br>
</span><b><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black">MIHAEL BRENKO<br>
</span></b><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:gray">TEAM LEADER / DEVELOPMENT ENGINEER<br>
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ZENITEL MARINE MED. OFFICE</span><span lang="EN-US"><o:p></o:p></span></p>
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